[Plugin: WP-Activity] Can't View Recent Activity on Multisite

I enabled the plugin on a site in a multisite network, and despite doing tons of activity, the Recent Activity log shows up blank. I’m fairly sure this is because in line 701, you try to select from $wpdb->prefix.”users AS users” … but that table doesn’t exist.

There IS a wp_217_activity, but not a wp_217_users table. There is a shared user table across all sites in a multisite install.

http://ww.wp.xz.cn/extend/plugins/wp-activity/